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The top documents tagged [special type of oxigen]
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1 THE ENVIRONMENT. AIR POLLUTION WATER POLLUTION RUBBISH NOISE
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[ai][e] [t ʃ ә] [ju:] recycleprotectNaturereduce wildlifespendPicturepollution frightentemperature
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WHAT ENVIRONMENTAL PROBLEMS DO THE PICTURES ILLUSTRATE? №1 1 2 3 5 №1№1 4
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